title: Mesoporous α-Fe2O3 nanospheres: structural evolution and investigation of magnetic properties.
abstract: A solvothermal route is adopted to produce mesoporous α-Fe(2)O(3) nanospheres by using polyethylene glycol as soft template and n-butanol/H(2)O as mixed solvent. The mesoporous α-Fe(2)O(3) nanospheres are subjected to calcination at different temperatures, and the specific surface area, pore size, and magnetic properties of the as-prepared nanospheres are investigated. The studies reveal that the pore sizes of the mesoporous α-Fe(2)O(3) nanospheres increase with higher calcination temperature, and high-temperature calcination brings about tightness of the pore wall. Magnetic studies show that aggregation of the small particles raises the Morin transition temperature.
authors.affiliation: School of Physics and Materials Science, Anhui University, Hefei 230039, PR China. liguang64@163.com
authors.forename: Guang
authors.initials: G
authors.lastname: Li
authors.forename: Mingyang
authors.initials: M
authors.lastname: Liu
authors.forename: Hui-Zhong
authors.initials: HZ
authors.lastname: Kou